<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script>
  // 假设服务端ip为127.0.0.1
  ws = new WebSocket("ws://127.0.0.1:2000");
  ws.onopen = function() {
    alert("连接成功");
    ws.send('tom');
    alert("给服务端发送一个字符串：tom");
  };
  ws.onmessage = function(e) {
    alert("收到服务端的消息：" + e.data);
  };
</script>
</body>
</html>